Solve the problem.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 7% cement should he mix with 5 bags of 19% cement to produce a mix containing 12% cement?
A. 17 bags
B. 9 bags
C. 12 bags
D. 7 bags
Answer: D
Mathematics
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Find the 50th term of the arithmetic sequence with a = - 8 and d = 4.
A. 146 B. 202 C. 188 D. 159
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Use Simpson's Rule with n = 4 steps to estimate the integral.
A. - 
B. -1 - 2
C. - 
D. - 
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Solve the inequality.x2 - 5x ? 0
A. (-?, 0] or [5, ?) B. [-5, 0] C. (-?, -5] or [0, ?) D. [0, 5]
Mathematics